Mathematics, 19.08.2019 16:10 sanchez626
It takes ralph 12 hours to paint a fence alone. lisa can do the same job in 15 hours. if ralph paints alone for 40 minutes before lisa begins , how long must they work together to finish painting the fence? give your answer as a simplified fraction.
Answers: 1
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It takes ralph 12 hours to paint a fence alone. lisa can do the same job in 15 hours. if ralph paint...
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